Respuesta :

Answer:

1.33moles

Explanation:

Given parameters:

Mass of LiF  = 34.58g

Unknown:

Number of moles of LiF = ?

Solution:

To solve this problem, we need to find the molar mass of LiF first.

 Molar mass of LiF  = 7 + 19  = 26g/mol

Number of moles of LiF  = [tex]\frac{mass}{molar mass}[/tex]  

 So;

 Number of moles of LiF  = [tex]\frac{34.58}{26}[/tex]   = 1.33moles